It's a common practice to truncate headlines when they are too long.
Key words here being "too long". I'd cut it after three or five first words, because users cannot construct (guess) the phrase by just two words. Another way would be to calculate a physiologically ideal width of column (something around 450 px) and stick to that.
Truncation typically comes in pair with full headline, exposed in tooltip or sliding out of ellipsis, all on hover.
P.s. H1 looks unnaturally big to me here.
Here is an amazing instrument for setting up typography on page with automatic coefficients, so that all kinds of text sizes (H1, H2, H3, base text and everything else) are in harmony. http://type-scale.com/
You can choose various coefficients to vary the difference between font sizes.