For males, TOTALLY separating them or destroying them is the standard solution. However, if for some reason you want to grow him out, there is a third option, but time is short. Get some Dutch Master REVERSE & PENETRATOR and treat both the male and female plants. It will kill the male organs and any pollinated female seed sites. The seeds die at whatever developmental stage it is used. I have used it with morphs and it WORKS.
It is the same chemical and procedure that is used to make seedless watermelons commercially.
I would probably just get rid of the male, but it is an option.
Hope this helps