Find the equation of the regression line for the given data. Then use this equation to make the indicated estimate. Round decimals in the regression equation to three decimal places. Round estimates to the same accuracy as the given data.

The following data gives the diameter in inches (measured 4.5 ft above ground) and the volume of wood (in ft³) for a sample of black cherry trees. Find the equation of the regression line, and then estimate the volume of wood in a black cherry tree that has a diameter of 15.0 in.

Diameter, d (in.) 8.8 11.0 11.2 11.7 13.7 16.0 17.9 20.6 Volume, v (ft) 10.2 15.6 19.9 21.3 25.7 38.3 58.3 77.0