It is a pity that that report simply states '750kg' without referencing it to a time scale or the final reserve from the flight plan for that flight.
I've just had a look at the holding fuel tables for the F70. At 34T (a typical landing weight for a full flight) and a hold at 1500ft the fuel flow is 1540 kg/hr. 750 kg would put them only 20kg under which equates to less that 1 minutes flying time.