6 day old??

Al

How much should a 6 day old be eating??? For the first few days of her being born she was eating 20-30ml every 2-3 hours. (Formula) Until my mother convinced me I was starving her when she kept wanting more. So we started her out on 2 ounces. She was eating only the two ounces for awhile but now she's still hungry after it. She will eat 4 ounces if she wants to. Isn't that too much? Or is that alright?