You're not going to get it exact if it's your first time. I have yet to do a shitload, but from what I learned from reading about many people who did. You got to start with something like 700-800 depending on your size. Some have to go up to even around 1000.
Just really depends on your size and how flat you feel you are. Head over to www.intensemuscle.com use the search function you got alot of experienced people who do that kind of shit all the time.