Ladies I need your opinions on rice cereal!

My son who will be 3 months in 1 week seems to almost constantly be hungry. He wants 5-6 ounces every 2 hours and sometimes even a little less than two. I figured he was eating enough because he is sleeping through the night almost all the time. Everyone keeps saying that he’s not being satisfied because he wants to eat too often and that I should try a small amount of rice cereal in his bottle. I didn’t really feel that was necessary at this point but now I’m starting to wonder since so many people are saying it. What are your thoughts?