Water is leaking out of an inverted conical tank at a rate of 6900 cubic centimeters per min at the same time that water is being pumped into the tank at a constant rate. The tank has height 14 meters and the diameter at the top is 5.5 meters. If the water level is rising at a rate of 18 centimeters per minute when the height of the water is 1.5 meters, find the rate at which water is being pumped into the tank in cubic centimeters per minute. cm min