i'm not sure but i do think the the liquid in her feed will count towards her intake.
it may tell you on the sachet if you still have it, or it could be worth looking on the manufacturers website what they reccommend.
i use 320ml bottles for my guineas, on average one adult piggy will drink between a third and a half of one on a cool day - so around 100-150ml which fits in with the guinea lynx guideline, as all my piggies are between 850g -1kg in weight.
they're housed outdoors though and when it's warm out there, they can go through up to three quarters of a bottle, or more, per day.
for today, just give her as much as she'll take, maybe aim for 80-100ml.
Make sure to call the vet as soon as you can though and see what they say to be sure.
as always be careful when syringe feeding her not to put too much in her mouth to avoid choking