Reference figure number without setting fig.cap in bookdown::html_document2 output



I want to add a title to a figure and reference the figure number in the document, but I do not want to show a figure caption (because the plot title is sufficient). The following attempt only gives me a figure number if I include fig.cap="This is my title" in the chunk options.

title: "test"
    toc: true
    toc_float: true
    toc_depth: 1
    code_folding: "show"
    theme: default
    highlight: tango
    fig_captions: no
    number_sections: false
```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```{r myplot, echo=FALSE}
ggplot(mtcars, aes(x=mpg)) +
  geom_density() + 
  ggtitle("This is my title")

What I get without setting fig.cap:

What I want (minus the caption):