At a county fair truck pull, two pickup trucks are attached to the back end of a monster truck as illustrated in the figure. One of the pickups pulls with a force of 1500 pounds and the other pulls with a force of 1000 pounds with an angle of 45 between them. With how much force must the monster truck pull in order to remain unmoved? (Hint: Find the resultant force of the two trucks.)

The monster truck must pull with approximately ____ pounds of force.

Round to the nearest hundred pounds as needed.