What is Tech Spec for Hosting a Townhall Meeting?

I am planning to host a Townhall community meeting in rural north carolina, my understanding there is T1 line with 100 Mbps, my question is, is this speed enough for me to hosting a 600 - 800 zoom call, or the speed is too slow for that many people log in at onetime, i am not tech savvy, any suggestion would be great appreciate.

jz