I feed my pup about 3 1/2 cups of Orijen Large breed puppy food spread out over 4 meals, he is pretty satisfied with that amount hunger and weight wise... and he is 4 months old, 40 lbs, and growing like a weed. I just switched from diamond naturals LPB formula where I was needing to feed 6 cups per day for the same effect!!
So the particular type of kibble matters when considering how much to feed. I've found that the guidelines on the back of the bag have been pretty accurate for how much my dogs needs with either brand.
What kibble are you feeding?