I managed to do 3x750m (instead of 5x750m) keeping the same split/time and rate (well, we were meant to be at rate 28, but I ended up at rate 30 'cause I can't keep my split low, otherwise… ), so I did:
1st 750m
Average split: 1.56
Time: 2.56.5
2nd 750m
Average split: 1.57
Time: 2.56.3
3rd 750m
Average split: 1.58
Time: 2.57.0
And then I collapsed, haha, I'm still shaking from my session at 5pm…