If your lo is happily taking that amount, not spitting up loads of milk, not in any discomfort, I would say that your lo is doing fine.
The 2.5 - 2.7 oz per llb of body weight is a guideline, and some lo's drink more and some lo's drink a lot less.
How many feeds is your lo having in a 24 hour period? How does your lo sleep at night?
My DD was on larger feeds during the day when she was the same age, and started sleeping through the night, so it was her way of tanking up to keep her full for the night.