What is the maximum amount of connected devices that a Nanostation loco m2 as AP can manage?

As stated in the question I installed 2 nano-stations loco m2 as AP in my company because I needed to cover 2 hallways , each hallway with 15 rooms side by side we have WIFI projectors and the clients on a peak day we can have almost 400 clients and I want the internet to work well for my clients and my projectors.

sorry for bad grammar.