Determine Flyers for Visitor Target

In a small town, the number of visitors to a local museum depends on the number of marketing flyers distributed. If the equation that models this situation is:

$$ V = 120 + 15f $$

where $V$ represents the number of visitors and $f$ represents the number of flyers distributed. The town wants to determine how many flyers must be distributed to achieve a target of 300 visitors. What is the value of $f$?