Some Olympic powerlifting teams train up to ten times per day! Volume does work, however there is a fine line of overtraining that you need to walk. Not everybody is the same, Personally speaking.. Volume works great. The more the better really. But only if I make sure to stay far away from failure on every set.
But..
In the end, you've got to try it for yourself and find out what happens. I know that's not what you wanted to hear but it's the truth.