I happen to have a flight plan for a similar trip on my iPad, 366 nautical mile ground distance with an 737 NG. Total flight plan fuel was 4259 with a final reserve of 787 kg, alternate fuel 992 kg and a burn of 2280 including taxi. Obviously we were not full as we were picking up most of the pax at an intermediate point and continuing on. But it is not unusual to have a planned remaining fuel quite a lot less than 2000kg. Equally last week I had a flight where I told the fueler to fill her up. We managed 20600kg saving three and a half thousand dollars by tankering fuel according to the data on the flight plan.