To make an ice-cream cone, employees at an ice-cream shop completely fill the cone and then add one scoop of ice cream on top. The cone has a height of 6 inches and a diameter of 2 inches. To the nearest cubic inch, how much ice cream is in the cone before the scoop is added on the top?
A 6 in³
B 19 in³
C 25 in³
D 75 in³