Hi there,
At this age your lo still needs to be taking at least 21oz (500-600ml's) a day, but this does not need to just include milk that they drink, it can include the milk that you put on her cereal, yogurts, cheeses etc - anything that contains dairy.
My DS is 10 months old and he drinks about 350 - 450mls a day and I make up the rest with his cereal, cheeses and yogurts.
HTH
Paula