The answer to this question depends on the location of each device, possible interference, signal coverage level and distances.
In general terms, an access point should be the last option we consider to connect a camera stream, since it is usually better to have two antennas communicating with each other (point to point) than several devices acting as a client connecting to an AP.
Taking into account that the cameras will be interfaced by means of WiFi standard 11n (2.4GHz channel), and that in real conditions usually 30-40 Mbps are consumed per connection on a theoretical maximum of 150Mbps within standard 11n per antenna, we can conclude that it is possible to have a stable connection of 3-4 cameras with the AP exclusively dedicated to them (not shared with PCs, smartphones, etc ...).
(reading WIFI5-AP1200D-IN's datasheet 1200Mbps of bandwidth are declared, but let's remind that this band refers to a MIMO configuration, by WiFi 11ac standard and using the 5GHz band).
It is theoretically possible to reach even a higher number of cameras, but above 3-4 units it would not be easy to guarantee a stable connection due to the fluctuating conditions that normally characterize networks; also, we should also keep in mind that the amount of information of each video stream depends on the type of scene (e.g. movement intensity, infrared lights activation status, FPS number, not to mention the compression format that can also imply a decisive increase of the band occupied by the images).