3. (10 points) There are several goldfish in two ponds, with the same number in each. Liangliang and Honghong are having a fish-catching competition. When the goldfish in the first pond are all caught, the ratio of the number of goldfish caught by Liangliang to those caught by Honghong is 3:4; when the goldfish in the second pond are all caught, Liangliang catches 33 more goldfish than he did the first time, and the ratio of the number of goldfish caught by Liangliang to those caught by Honghong is 5:3. Therefore, there are ( ) goldfish in each pond.
A. 112
B. 168
C. 224
D. 336